心拍変動, 唾液成分および脳波による咀嚼時交感・副交感神経系活動の評価

• 石山 育朗

  Physical Education Laboratory, Kokugakuin Tochigi Junior College

• 鈴木 政登

  Department of Laboratory Medicine, Jikei-kai University School of Medicine

• 佐藤 誠

  LOTTE Co., Ltd Central Laboratory Chewing Gum Section

• 中村 泰輔

  LOTTE Co., Ltd Central Laboratory Chewing Gum Section

書誌事項

タイトル別名

• Application of Heart Rate Variability, Salivary Constituents and Electroencephalographic Elements to Evaluate Function of the Sympathetic or Parasympathetic Nerves during Masticatory Exercise

抄録

In order to clarify whether or not masticatory exercise (= chewing) can induce arousal through sympathetic activation or relaxation through parasympathetic activation, we measured heart rate and its variability with analysis of power spectrum (low and high frequency; LF, HF), blood pressure (BP), saliva (flow rate, constituents) and electroencephalogram (α and βA waves) of nine healthy male subjects aged 20 to 42 years during chewing . The subjects chewed gums consisting of gum base only (C) and gum base plus theanine as the substance to evoke relaxation (RX), and two consistencies (soft, hard) respectively . We discussed changes that occurred during chewing, and also the influence of theanine in RX gum.<BR>During gum chewing of both RX and C, Heart rate, BP, salivary flow rate increased, while wave height of plethysmogram decreased. Salivary flow rate, concentrations of total protein, α-amylase and electrolytes (Na, Cl, K) of saliva increased during chewing of RX gum much more than during C. Immunoglobulin (sIgA) concentration and LF/HF power rate decreased during chewing of C gum; in contrast, it didn't change during chewing of RX gum . Cortisol concentration didn't change during chewing of both gums. The α wave remarkably decreased during chewing of C gum.<BR>In conclusion, it can be concluded that chewing remarkably increased the activities of the sympathetic nerve, without regard to taste of gum, especially during chewing. However, focused on the changes in the buccal cavity, the parasympathetic nerve was also slightly activated during chewing. Chewing of the RX gum influenced the increase of salivary secretion much more than chewing C gum. Once chewing of both RX and C gums stopped, the activated parasympathetic nerve appeared to become dominant over the sympathetic nerves, judging from cardiovascular markers. According to the changes in sIgA and a wave, relaxation as an effect of chewing might result from digesting an ingredient.

収録刊行物

• 日本咀嚼学会雑誌

  日本咀嚼学会雑誌 16 (2), 55-69, 2006

  特定非営利活動法人 日本咀嚼学会

詳細情報

• CRID: 1390282679442852352
• NII論文ID: 10020335373
• NII論文ID: 130004304516
• NII書誌ID: AN10375302
• DOI: 10.14858/soshaku1991.16.55
• ISSN: 18844448
• ISSN: 09178090
• Web Site: https://search.jamas.or.jp/link/ui/2007276402
• データソース種別:
  • JaLC
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可